Linux下将PHP添加到环境变量，将Mysql加入环境变量。

1.修改/etc/profile

vi /etc/profile

2.添加两行

PATH=$PATH:/usr/local/php7/bin:/usr/local/mysql/bin
export PATH

usr/local/php7
是php7的安装路径

usr/local/mysql
是mysql的安装路径

3.执行命令
source /etc/profile

4.查看是否成功

echo $PATH

[root@localhost ext]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/php7/bin:/usr/local/mysql/bin

成功了！

[root@localhost ext]# php -version
PHP 7.1.2 (cli) (built: Dec 26 2017 19:46:16) ( ZTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2017 Zend Technologies

[root@localhost ext]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 13
Server version: 5.6.38 Source distribution

Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

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